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https://issues.apache.org/jira/browse/FLINK-2983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14993634#comment-14993634
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Gyula Fora commented on FLINK-2983:
-----------------------------------
Alright I see your point we can think about this if it comes up often. Although
I think it's very common that the default state is not a simple value you can
specify.
> Add StateLoader as an alternative to default KvState
> -----------------------------------------------------
>
> Key: FLINK-2983
> URL: https://issues.apache.org/jira/browse/FLINK-2983
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Gyula Fora
>
> To create key-value states the user currently needs to specify a default
> state value that will be returned on first access. Even though this support
> nulls for implementing the initialization logic this is not a clean solution.
> I propose to allow the user to pass a StateLoader instance which would load
> the default state:
> interface StateLoader<I, K,S>{
> S loadState(K key, I currentInput);
> }
> The default value implementation could also use the state loader logic where
> the stateloader would just return a copy of the given value on the loadState
> call.
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